DE3123472A1 - FEEDER TABLE SECURITY RELEASE MECHANISM - Google Patents

Description

description

The present invention relates generally to mechanisms for releasable or releasable support of a structure and in particular on a feed table release mechanism of an offset printing press, the release mechanism being triggered by an easily and safely accessible release button to prevent it from falling of the feed table to a lowered position and access to the interior of the printer head of the Press to facilitate ..

According to U.S. Patent '3,218,064, the entire contents of which are hereby incorporated Referring to it, it is known in the art to use the end of a printing press feed table adjacent the print head to be supported by means of a release mechanism. This known release mechanism is operated by a locking handle which is generally located in the paper feed path above the Paper feed conveyor and directly to the printer head housing is adjacent, which contains the rotating cylinders. When the release mechanism is triggered by means of the locking handle, parts of the hand of the printing press operator can inadvertently be released get into the print head housing containing the rotating printing cylinders. Furthermore, if the operator reaches the locking handle, catch a loose shirt sleeve or the like on the paper feed conveyor and the Pull the operator's arm into the printer head housing. Eventually it makes one movement of such a locking handle to a release position requires that the handle in the printer head be moved to the rotating cylinders. It it should be noted that such a dangerous condition is too considerable Injury to the hand of the press operator. ·. ·

In the known release mechanism, the moving parts thereof, that is, engaging or hook members 41, 42, are on each Side of the printer head housing attached and fixed. Each engagement member supports one side of the printer head

the end of the feed table. In order for the Table a simultaneous movement of the engaging members 41, 42 To provide a rotatable shaft 46 extends between the engagement members across the paper entry opening of the printer head. It can be seen that the shaft 46 makes access to the printing cylinders difficult when the table is lowered to its Position 'has fallen.

The aim is to create a release mechanism that avoids the above security problem and that alleviates access to the printer head cylinder is facilitated, highly expedient, reliable, and relatively easy to meet cost targets.

According to the invention, arm means are used to achieve the object set at a position fixed with respect to the pivotably attached end of a feed table. One longitudinal extending rod attached to the feed table at one point below Distance from its pivotally mounted end is attached, is axially movable backwards and forwards between two end positions. The rod ends lock with the arm means at one of the end positions to support the table. At the other end position of the axially movable rod, the rod ends are released and unlocked by the arm means. Preferably the axial movement of the rod is effected by a user accessible button attached to the rod via an arm link extending radially from the longitudinal axis of the rod with the button located under the feed table.

The release mechanism according to the invention largely reduces the possibility of the press operator releasing the feed table to move it to its lower position to drop accidentally reaches the rotating printing cylinders with her hand. It is also the main part of the release mechanism carried by the feed table. If thus the feed table falls to its lower position, the release mechanism also falls to a lower position so that it does not impede access to the printer head cylinders.

The invention is illustrated below with reference to a drawing illustrated embodiment explained in more detail. Show it:

Figure 1 - in a left-hand view (side of the operator) an offset printing press with a feed table, the one at one end by a release mechanism according to the invention is supported,

Figure 2 ~ the printing press shown in Figure 1 in a right-hand view,

Figure 3 - in a plan view of the release mechanism according to the invention, with parts of the same and the associated feed table cut away,

FIG. 4 - a side view of the release mechanism according to the invention, with parts of it cut away,

Figure 5 - in a side view of a support arm on one side of the printer head housing and having one end of a rod associated with the release mechanism can be brought into engagement,

FIG. 6 - that shown in FIG. 5 in a perspective view and / arm separated from the printer head,

FIG. 7 - a cross section along the line 7-7 from FIG. 4, FIG. 8 - an end view along the line 8-8 from FIG. 4 and FIG FIG. 9 - an end view along the line 9-9 from FIG. 4.

Referring to Figure 1, there is an offset lithographic printing press 10 of FIG shown on the left or operating side. The printing press contains a magazine 12. with conventional sheet feeding means for successively feeding separate sheets from a stack of sheets. 14, supported by a vertically movable infeed subframe 16 is supported. The magazine 12 is itself supported by a base part 18, which in turn by four Legs 19 is supported (only two legs are shown) -. The subframe 18 also supports a cylinder containing a spaced apart from the magazine 12 as shown Print head 20 off. This is conventional and contains, for example, a plurality of cylinders, to those in offset printing a blanket cylinder,

at least one plate cylinder and one printing cylinder (impression cylinder) · belong.

According to the known technique, sheets are made of to be printed Material from the sheet stack 14 is passed singly through the printer head 20, where the sheets are printed. The print sheets are then transferred or delivered to a conventional receiving station (not shown).

According to Figures 1 and 2, a feed table 30 extends from »The magazine 12 to the printer head 20, and this table is used to feed or convey the sheets to be printed. That to the magazine adjacent end of table 30 is pivotally mounted by conventional pivot means 32. The other end of the table 30, i.e. the end adjacent the printer head, contains a mechanism according to the present invention for releasable Support this end of the table. When the release mechanism 40 is triggered to a release or unlock state, enabled he a falling of the table to its lower position, which is shown at 31 in phantom. When the table 30 is in the lower state, the user of the printing press has access to the interior of the printer head 20, for example to effect an adjustment of the printing plate carried on the imaging cylinder (plate cylinder) or to adjust the printing blanket and blanket and impression cylinders, if necessary.

If you want to resume printing, the table 30 is lifted pivoting about the pivoting means 32 by hand ,, until the release mechanism 40 locks in position for support by a left-hand one Table support arm 22 (Figure 1) and a right-hand table support arm 24 (Figure 2). These arms 22, 24 are on the Printer head, and in particular to the printer head housing, fixed in a manner explained in detail below.

While table 30 is shown with its release mechanism 40 installed in a lithographic offset printing press 10,

it should be noted that other types of printing presses or other devices can be used, which a table means, such as the feed table 30.

In Figures 3 and 4, the release mechanism 40 is more detailed shown. The printer head includes a housing having a left printer head housing wall 26 and a right printer head housing wall 28. The left side table support arm 22 is attached to the left print head housing wall 26 by a suitable fastener fixed, namely in the illustrated embodiment by a screw 22a screwed into the wall 26. A corresponding screw 24a is used to fix the right-hand table support arm 24 to the right-hand printer head housing wall 28. The arms 22, 24 are in their .Montagepositionen generally along a common horizontal axis that is parallel to the axis of pivoting movement of the feed table to be the magazine 12 extends adjacent the pivotally mounted end (see Figures 1 and 2)

The feed table 30 includes a left side support rail 35 and a right side support rail 36 extending from the magazine 12 to the printer head 20 (see Figures 1 and 2). the Support rails 35, 36 are generally parallel and spaced apart about a flat sheet metal table section 33 to wear. This is attached to the rails 35, 36 by suitable means, for example by welding.

The release mechanism 40 of the present invention is carried by the feed table 30, and in particular the table section 33 on which a left side release mechanism support arm 44 and a corresponding right side release mechanism support arm 46 are attached. These arms are attached to the table section 33 by suitable screws 44a and 46a. The release mechanism support arms 44, 46 extend vertically downward at a slight angle away from table section 33; They have generally the same vertical lengths and are parallel to each other. .

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The lower portions of the arms 44, 46 each contain an opening, which is preferably limited by a bushing, the diameter of which is appropriately sized to receive a longitudinally extending rod 42 which, to a limited extent is axially movable backwards and forwards. The rod is generally parallel to the axis of rotation of the table hinged end. The rod ends include an end face 42a on the left side of the printing press and another Face 42b on the right side of the printing press. The rod 42 is according to the illustration in FIGS. 3 and 4 • spring-loaded to the left in order to establish an end position. The spring preload the rod is provided by a helically wound, longitudinally extending bias spring 48, which is arranged around the rod 42 as shown. The feather 48 is located between the left side release mechanism support arm 44 and a spring retainer plate 49 which is supported by a Shaft engagement s-retaining ring 49a received in a circumferential groove in rod 42 is held in position. The axial Movement of the rod 42 to the right is limited by a stop collar 50 which is fixed by means of a stop collar locking screw 50a is held in position on the rod 42. Vice versa extends an inserted into the rod 42 in a radial interference fit Stop pin 52 away from the rod to a stop to limit the axial movement of the rod 42 to the left, as can be seen in FIGS. It is it can be seen that the degree of axial movement of the rod 42 by the distance between the stop collar 50 and the stop pin 52 is determined. In a normally biased position, the spring 48 biases the rod 42 to its far left position before, in which the bolt 52 rests on the support arm 44. When the table 30 is in its raised position at this position finds, as previously discussed in connection with Figures 1 and 2, the ends of the rod 42 come into engagement, respectively with one of the feed table support arms 22,24.

A release button 60 is provided to follow the rod 42 move right, being the. Bias spring 48 compressed between moving disc 49 and fixed arm 44

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and the ends of the rods for the table 30 to fall an engaging with the support arms 22, 24 are released. The release button 60 is connected to rod 42 via a release button shaft 61 fixedly connected, at one end of which the release button 60 is fastened by a button retaining nut 60a. The other end of the Shank 61 is at the end of a radially extending release button support arm 54 fixed, the other end with an opening is provided to receive the rod 42 as shown, with a support arm locking screw 55 for rotationally Blocking the release button support arm 54 with respect to the rod 42 provides. A bolt 57 extends at right angles from the arm 54 in a direction parallel to the rod 42 and as shown through an opening in the arm 44. The length of the bolt 57 is at least as large as the axial distance by which the rod 42 can move, the bolt 57 constantly with the opening of the arm 44 is held in order to prevent the rod 42 from rotating. The release button shaft 61 extends in a direction generally parallel to rod 42, from below the feed table 30 and spaced from the printer head 20 (see Figure 1). Such a structure reduces the possibility that the hand of an operator when grasping the Release cylinder 60 the rotating cylinders in the printer head is exposed.

To release the ends of rod 42 from arms 22 and 24, push the press operator pushes button 60 from left to right right, as shown in Figures 3 and 4, to the Rod 42 to move axially to the right until the stop collar 50 rests against the right-hand release mechanism support arm 46.

Referring to FIG. 4, the detachment of the left end of the rod 42, and in particular its end face 42a, from the arm 22 is carried out discussed. When the table 30 is in its normally raised position, the left end of the rod 42 is passed through from below a supporting edge portion 22b is supported extending in a horizontal direction. During the releasing movement of the rod 42 to the right, the left end of the rod slides off the supporting edge portion 22b, whereby the table 30, which the rod 42

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carries, begins to move down, either through Gravity or by a force applied by the press operator. It should be noted that the other End of the rod, that is, the right rod end containing the end face 42b, to be discussed in detail below Way is freely movable downwards. When the rod 42 moves down at its far right axial end position, the end face 42a comes into engagement with a flat section 22c of the arm 22. It can be seen that the operator is at this position can release the button 60, wherein the rod 42 is held at its far right axial end position and wherein the bias spring 48 remains compressed due to the holding effect of the flat portion 22c.

With a continued downward movement of the table "30 is reached the end face 42a of the rod, according to the dashed line, has a ramp section which faces away from the end face 42a of the rod is inclined in a downward direction. Due to the bias effect the biasing spring 42 slides the end face 42a when moving the table downwards along the ramp section 22d, to return the rod 42 to its normal left position. The table 30 can now move downwards to its lower one Continue position 31 as shown in FIGS.

It can also be seen that the operator of the printing press without manipulating the release button 60 the table to his can return the raised position. This is done by lifting it and locking it in position, as the front side 42a comes into engagement with the lower part of the ramp section 22d when moving upwards in order to slide along it, moving to the right until the flat portion 22c is reached. Then it becomes the rightmost position until the top of the flat portion 22c is released. Subsequently, the pretensioning effect leads to the compressed biasing spring so that the end face 42a of the rod snaps over the support edge portion 22b to the left to effectively support the table 30 from below.

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The loosening of the other end of the rod with the end face 42b of the right side feed table support arm 24 will now be discussed with reference to FIGS. If the left front side 42a on the flat portion 22c and the left feed table support arm 22 slides, the rod 42 becomes at its rightmost for a predetermined period of its downward movement Position held. The far right end portion 47 of the rod

42 is shown to have a diameter generally that of of the central portion of the rod 42 corresponds. This end section 47 is from the central section of the rod 42 by a reduced-diameter section 43 and a truncated one Conical section 45 separated, the tip of which is inside or lies inward of its base.

According to FIG. 6, the arm 24 has an opening 25, the diameter of which is slightly larger than the diameter of the end section 47. The opening opens down to a slot 25a, the one Width which generally corresponds to the reduced diameter portion

43 of the rod 42 corresponds to «The slot extends along the arcuate path followed by the reduced diameter portion 43 as the table 30 moves downward. When the pole 42 is at its rightmost position, it is the reduced diameter Section 43 aligned with slot 25a so that it can move down through this to get away from the right-hand feed table support arm 24 to release. When the table 30 is in its fully raised position and the bar 42 are in their leftmost position, as discussed in connection with Figures 3 and 4, and when the End section 47 is in engagement with opening 45 and in this is held because sein.Durchmesser is largely greater than the width of the slot 25a, the end portion 47 can not move downward through slot 25a.

It can be seen that with an axial movement of the rod 42 to the right as shown in FIG. 4, both rod ends free to move downward and release from their respective feed table support arms 22,24. Vice versa moves the table up from its lower position

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to restore the far right axial end position of the rod 42, the reduced-diameter portion 43 of the Rod 42 is vertically aligned with slot 25a of arm 24 so that end portion 47 of the rod enter opening 25 when the rod 42 snaps to the left upon reaching the top of the flat portion 22c of the arm 22. The dull one Conical section 45, the end section 47 of the reduced diameter Section 43 of the rod separates, serves to effectively guide the end section 47 into the opening when the Rod moved to the left in its raised position when locking. The base section of the cone has a diameter which is equal to that of the end portion 47, while the 'tip or front part of the truncated cone portion 45 has a diameter generally equal to that of the in one Slot 25a received reduced diameter portion 43 is. According to FIG. 9, the end section 47 is in an engagement position shown within the opening 25 in order to hold the table 30 in its raised position by supporting it and also to avoid further lifting.

In Figures 7 and 8 it is shown that the left-hand support arm 22 supports the feed table 30, with the release button 60 has a distance from der.Gehäusewand 26 and under the table 30 is arranged. Such a position of the release button 60 greatly reduces the possibility that an operator of the .Druckerpresse injure their hand when releasing the table 30 can inadvertently get them into the printer head housing can arrive at a location above the feed table 30, wherein the hand could be dangerously exposed to the rotating cylinder in the printer head.

It can be seen that the release mechanism according to the invention provides a safe means of lowering the feed table mechanism 40 while being relatively simple and straightforward Structure has. While a preferred embodiment of the present invention has been shown and described, is note that various modifications within the scope of the invention and facilities of the parts can be made.

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Claims (1)

White Consolidated Industries, Inc., 11770 Berea Road, Cleveland, Ohio 44111 (USA) Feed table security release mechanism Claims 1J mechanism for releasably or removably supporting the end - ^ a table whose other end is pivotally mounted, characterized by arm means (22, 24) which are fixed in position with respect to the pivotally mounted end (32) of the feed table (30) , and by a longitudinally extending rod (42) attached to the feed table (30) at a location spaced from the pivotally mounted end (32) and axially movable back and forth between two end positions, the rod ends at one of the Lock end positions for supporting the table (30) with the arm means (22, 24) and released and unlocked at the other of the end positions by the arm means (22, 24). ■ 2. Mechanism according to claim 1, characterized by a means accessible to a user for moving the rod (42) between the end positions, the means including a button (60) attached to the rod (42) via an arm link (54) extending radially from the longitudinal axis of the rod (42) with the button (60) below the plane of the feed table (30) is arranged. 3. Mechanism for releasable or releasable end support a table the other end of which is pivotally mounted, characterized by a pair of feed table support arms (22, 24) fixed in position with respect to the pivotably mounted end (32) of the feed table (30) and one mutual Spaced and along a common axis and by a longitudinally extending rod (42), which are attached to the feed table (30) at a point below - o - stood by the pivotally mounted end (32), which is further axially rearward and back between the two end positions is forwardly movable and which lies generally along the common axis and is spring biased towards one of the end positions with the ends of the rod (42) at one of the end positions in locking engagement with the arms (22, 24) step when the table (30) is in a raised position and the ends of the rod (42) are on the other the end positions of the arms (22, 24) can release a pivoting movement of the table (30) to a lower position to enable. 4 _f mechanism according to claim 3, characterized in that the longitudinal axis of the rod (42) runs parallel to the axis of rotation or pivoting of the table (30) which is arranged at the pivotably attached end (32) of the table (30), wherein the rod (42) extends generally between the arms (22, 24). 5, mechanism according to claim 3, characterized in that one of the arms (22) have a horizontally extending supporting edge portion (22b) and one extending downward therefrom Includes ramp portion (22d) which extends in a downward direction from the end of the rod (42) which can come into engagement with one of the arms (22) inclined so that the Rod (42) is spring-biased towards the ramp section (22d) that an upward movement of the table from its lower position tion leads to the fact that the end face (42a) of the rod, which can be engaged with one of the arms (22), encompasses the ramp section (22d) that continued upward movement of the table (30) causes the ramp section (22d) to hit the End face (42a) exert a horizontal force component in order to move the rod (42) away from one of the arms (22), that the rod end that can be engaged with one of the arms (22) is supported from below by the edge portion (22b) when a continued upward movement of the table (30) the end face (42a) reaches the top of the ramp section (22d) and detaches therefrom, and that the rod (42) snaps back to its biased end position with the rod end overlying the support edge portion (22b). «■ 3 - Mechanism according to claim 5, characterized by for the user accessible means for axially moving the rod (42) away from its spring-biased end position, around the rod end to release from the support edge (22b), wherein the table (3) is freely pivotable downward to its lower position that the user accessible means include an arm member (54) extending generally radially from the rod (42) and is firmly connected to it, and that a button (60) is attached to the • remote end of the arm link (54), which is below the level of the feed table (30). Mechanism according to claim 5, characterized in that one of the arms has a vertically extending flat section (22c) which separates the horizontal edge section (22b) and the ramp section (22d), the flat Section (22c) with the end face (42a) engages around the rod (42) during part of the upward movement to hold the table (30) at a constant axial position that the other arm contains an opening (25) for receiving and supporting the other end (47) of the rod (42) is sized so that the other arm includes a slot (25a), which extends downwardly from the opening (25) and opens to a reduced diameter portion (43) of the other End of the rod (42) when the table (30) moves upwards, the width of the slot (25a) being smaller than the diameter of the opening (25) is that of the reduced diameter Section (43) inboard (inboard) from the end face (42b) of the other end (47) of the rod (42) is that the reduced diameter portion (43) with the slot (25a). is aligned vertically and taken from it is when the table (30) moves through the portion of the upward movement in which the rod (42) through the flat section (22c) is held at the constant axial position so that the diameter-reduced section (43) moved out of vertical alignment with the slot (25a) when the rod (42) snaps back to its final biased position, and that the other end (47) is received by the opening (25) and supported by one of the arms will. - 4 - 8. Mechanism according to claim 7, characterized in that the reduced diameter portion (43) is generally at the top an axially extending, truncated conical section (45) of the rod (42) is arranged that the base section of the truncated cone section (45) has a diameter which is equal to that of the circular opening (25), and that the truncated conical section (45) serves to close the other end (47) in receiving relationship with the opening (25) when the reduced diameter portion (43) moves out of vertical alignment with the slot (25a) and the rod (42) at the raised position of the table (30) snaps back to its biased end position. - 5 -